The word 'fictitious' is misspelled as 'ficticious' during the opening disclaimer.
There is a scene where the young man is asked to buy cigarettes. He finds out why and begins to argue with the other 2 cons about it. As they all 3 walk into the corridor at the the top left area of the screen, clearly the Mic is seen for about 2 seconds. The same thing happens again near the end of the film, when the guard is talking to the warden in his office.